Hun Sen, whose Cambodian People’s Party took every seat in the national assembly in last month’s elections, is the world’s longest-serving prime minister (since 1985). His recent electoral victory was assured in November 2017, when Cambodia’s Supreme Court dissolved the main opposition party after the government filed a lawsuit accusing it of conspiring with foreign powers to stage a revolution. Forty years ago Hun Sen was a Khmer Rouge battalion commander. Fearing a purge, he fled to Vietnam in 1977; he returned in 1979 with Cambodian rebel forces and the Vietnamese Army which overthrew Pol Pot’s regime. The Extraordinary Chambers in the Courts of Cambodia was set up in 1997 to try ‘the most senior’ surviving Khmer Rouge leaders, or those ‘who were most responsible’ for the atrocities committed under Pol Pot.